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Nervous System-Lobes

vocab, Lobes and primary/associative Cortexes

Structural unit or cell in the nervous system, capable of transmitting electrochemical signals. Neuron
Bundles of nerve fibers that transmit electrochemical signal to and from the CNS Nerves
Neurons that conduct away from the neuron cell body or CNS Efferent
Neurons that conduct toward the neuron cell body or CNS Afferent
Efferent neurons located in the Central Nervous system Upper motor neuron (UMN)
All sensory nerves/neurons are________. Afferent
All motor nerves/neurons are _________. Efferent
Function is to work in conjunction with lower motor neuron to act as path ways for movement. Upper motor neuron (UMN)
located in the PNS, synapses with muscle fibers to produce muscle contraction. Lower motor neuron (LMN)
Efferent neurons, directed by upper motor neuron to contract muscles both voluntarily and reflexive Lower motor neuron (LMN)
Functional unit that produces movement. Motor unit
Consists of LMN & all of the muscle fibers that it innervates (Control of muscles that are attached to or muscles that it transmits to). Motor unit
When a motor unit contracts what happens? all the muscle fibers have to fire or contract (all or nothing phenomenon).
Cell body of neuron Soma
Branches that conduct electrical impulses toward the soma. Dendrites
Branches that conduct electrical impulses away from the soma. Axon
What makes up the CNS? Brain, brainstem, & spinal cord
shallow depression or grove Sulcus
Deep depression or grove Fissure
A ridge Gyrus
Major portion of the brain Cerebrum
What type of movements is the brain responsible for? purposeful as well as reflexive
Where is the brain contained? Within the cranium
What is the function of the brains as a whole? Integrates information received from all the different lobes and structures and operates smoothly & efficiently, faster than a computer
What is the shell of the brain called? Cortex
What type of matter is the cortex comprised of? Gray matter
What type of matter is the interior portion of the brain comprised of? White matter
Large mass of white matter that connects the left & right hemispheres of the brain. Corpus Callosum
What type of fibers make up the Corpus Callosum? Commissural Fibers
The largest commissural fiber. Corpus Callosum
Connect areas within the same hemisphere Association Fibers
How are lobes of the cerebrum located on the cortical surface? By sulci & gyri
lobe located at the front part of the brain Frontal Lobe
Part of brain that guides thought, social behavior, multi tasking, organization, ability to plan, intuition, personality, ability to be empathetic, self control, inhibition, aids in memory function and new learning Function of the Frontal Lobe
Inferior: Lateral Sulcus (AKA Sylvian Fissure) Posterior: Central Sulcus (AKA Rolandic Fissure) Superior & Anterior: Outer surface of the brain Boundaries of the Frontal Lobe
Primary function or area of the frontal lobe Primary Motor Cortex
Location of the Primary motor cortex Precentral Gyrus
Long prominent surface elevation located immediately anterior to the central sulcus Precentral Gyrus
Responsible for voluntary control of skeletal muscles on the Contralateral side of the body. Precentral Gyrus
Is more brain matter devoted to fine or gross motor control? Fine Motor control
Location of the the Primary Motor Cortex Precentral gyrus
Premotor area of the frontal lobe, at the Inferior Frontal Gyrus Where Broca's area is located
Responsible for motor planning for speech production Broca's Area responsibility
Area that does not send signals to muscles only plan to primary motor cortex Broca's area
Which hemisphere is the language dominant hemisphere? The left hemisphere
Anterior boundary of parietal lobe Central sulcus
Inferior boundary of parietal lobe Posterior & Lateral Sulcus
Posterior boundary of parietal lobe Posterior Sulcus or Parietoccipital Sulcus
Function of Parietal Lobe Primary Sensory Cortex
Location of Primary Sensory Cortex Post-central gyrus
Registers sensations such as pain, touch, and temperature from the contralateral side of the body. Parietal Lobes
Partially responsible for Proprioception (awareness of body position in space) Parietal lobes
Located in the Parietal Lobe, just posterior to the central Sulcus. Location of Post-central gyrus
Areas involved with your awareness of things Primary Areas
Areas responsible for interpretation Association areas
Primary & association areas located where are not involved in speech & language? Around the lateral sulcus
Superior boundary of Temporal lobe Lateral Sulcus
Posterior boundary of Temporal lobe Posterior Sulcus/ Parietoccipital Sulcus (Imaginary line that separates it from the occipital lobe).
Primary function of Temporal Lobe Primary Auditory Cortex
Site of higher auditory processing, memory and perceptual judgments Responsibility of Temporal lobe
Located just below and on the interior wall of the lateral sulcus. Auditory info from both ears is transmitted to the primary auditory cortex in both hemispheres. Heschl’s Gyrus aka Primary Auditory Cortex
Auditory Association Cortex Wernicke’s Area
Located on the posterior part of the superior temporal gyrus. Wernicke’s Area
Inferior to the frontal and parietal lobes. Temporal Lobes
Located in the most posterior part of the brain. Occipital Lobe
Separated from the parietal & temporal lobes by imaginary lines that follow interior landmarks. Occipital Lobe
Houses the Primary Visual Cortex & Visual Association Areas. Occipital Lobe
Makes you aware of what you're seeing Primary Visual Cortex
Interprets what you see Visual Association Areas
What area is important for language formulation? Wernicke’s Area
Responsible for language comprehension and generation of linguistic thought. Wernicke’s Area
What is the most posterior lobe? Occipital lobe
Lobe not related to speech production but important in reading Occipital lobe
What type of fibers connect the Broca's area to Wernicke’s Area Association Fibers
Fibers that connect areas within the same hemisphere Association Fibers
What's an example of an Association fiber? Arcuate Fasciculus
Consists of groups of fibers that form association tracts between areas, within lobes, and between lobes. Association Fibers
Fibers that connect an area in one hemisphere to an area in the other hemisphere Commissural Fibers
The largest commissural fiber Corpus Callosum
Location of Primary auditory cortex Temporal lobe
Location of Primary visual cortex Occipital Lobe
Created by: aramos139



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